Sighting-target.



F. HIGGINS.

SIGHTNG TARGET.

APPLICATION FILED JUNIN, 1913.

Patented Dec. 16, 1913.

` STATES PATENT FFICE.

FRANK HIGGINS, OF MULBERRY, KANSAS.

SIGHTING-TARGET.

To @ZZ whom may concern Be it known that I, FRANK HIGGINS, a citizen of the United States, residing at Mulberry, in the county of Crawford, State of Kansas, have invented certain new and useful Improvements in Sighting-Targets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to sighting targets.

In the operation of mining it is essential that the tunnels or drifts be extended in a straight line previously determined by surveyors and to accomplish this end two plumb lines are suspended from the ceiling of the tunnel or drift at its entrance and if it is desired to determine the correct direc tion of the drift it is necessary for one miner to sight at the entrance of the drift and another miner to hold a light at the working face and move such light under orders from the miner at the plumb lines until same enters the plane of the two plumb lines. As the length of the tunnel or drift increases it is necessary to call upon a third miner to relay the instructions of the miner at the plumb lines to the miner at the work ing face as to how to move his light to bring same into the plane of the plumb lines.

It is therefore the object of this invention to provide a sighting target which will enable the miner at the working face of the tunnel or drift to determine without the as sistance of others the true direction in which to advance the tunnel or drift.

Vith the above and other objects in view the invention consists in the detail of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which- Figure 1 is a vertical section through a mine tunnel or drift showing the improved target in use; Fig. 2, a section on the line 2-2 of Fig. 1, and Fig. 3, a detail perspective view of the target detached.

Specification of Letters Patent.

Application filed .Tune 17, 1913.

Patented Dee. 16, 1913.

Serial No. 774,269.

Referring to the drawings A indicates the tunnel or drift of a mine and B a working face thereof. Mounted in the ceiling of the tunnel or drift A and disposed in the predetermined line of the drift or tunnel are plugs 10 and 11 from which are suspended respectively plumb lines 12 and 13 carrying at their lower' ends rings 14.

The target proper comprises a tubular bar 15 having laterally directed ends 1G and 17 which are adapted to support lights 1S and 19 respectively. Secured to the bar 15 are hooks 20 and 21 which are disposed the same distance apart as the plumb lines 'l2 and 13.

If the miner at the working face B desires to verify the direction iu which to advance the tunnel or drift it is only necessary for him to attach the hooks 20 and Q11. of the bar 15 to the rings 14- respectively and illuminate the lights 18 and 19. As soon as movement of the bar 15 has ceased the miner will proceed to the working face B and manipulate a third light of any suitable character and indicated at C until saine is disposed in line with the lines 18 and 19 `when the position of the line C will determine the center of the advance of the drift or tunnel which he is about to make.

What I claim is 1. A sight target of the class described comprising a bar provided with means for connection to a plurality of plumb lines whereby same may bc supported in suspension, said bar having means for supporting a light at each end of the bar in the plane of the plumb lines when the bar is supported thereby.

2. A sight target of the class described comprising a tubular bar having its ends bent laterally in the same direction, means for connecting said bar to a plurality of plumb lines to support the laterally bent ends in a vertical plane, and a light element engaged in the bore of the bar at each end.

In testimony whereof, I ailix my signature, in the presence of two witnesses.

FRANK HIGGINS.

Witnesses It. B. THonrn, JOHN IEDROJA.

Copies of 'this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C." 

